Sometimes I worry about this child and that child … in the end, there was no need for me to worry about Missy Z. She was determined and she was clever. It became clear to her that absorbing new techniques and understanding would improve her solving skill.

She came in for extra work and pushed hard.

In the end, I found her solving with high rate of accuracy and no longer using “guess and check” — that is a crutch that has to be let go.